后台添加css和js

    /// <summary>
    /// 添加JS脚本链接
    /// </summary>
    /// <param name="page">页面</param>
    /// <param name="url">路径</param> 
    public static void AddJS(System.Web.UI.Page page, string url)
    {
        HtmlGenericControl jsControl = new HtmlGenericControl("script");
        jsControl.Attributes.Add("type", "text/javascript");
        jsControl.Attributes.Add("src", url);
        page.Header.Controls.Add(jsControl);
    }

    /// <summary>
    /// 添加JS脚本内容
    /// </summary>
    /// <param name="page">页面</param>
    /// <param name="content">脚本内容</param> 
    public static void AddScript(System.Web.UI.Page page, string content)
    {
        HtmlGenericControl scriptControl = new HtmlGenericControl("script");
        scriptControl.Attributes.Add("type", "text/javascript");
        scriptControl.InnerHtml = content;
        page.Header.Controls.Add(scriptControl);
    }

    /// <summary>
    /// 添加CSS样式链接
    /// </summary>
    /// <param name="page">页面</param>
    /// <param name="url">路径</param> 
    public static void AddCss(System.Web.UI.Page page, string url)
    {
        HtmlLink link = new HtmlLink();
        link.Href = url;
        link.Attributes.Add("rel", "stylesheet");
        link.Attributes.Add("type", "text/css");
        page.Header.Controls.Add(link);
    }

    /// <summary>
    /// 添加CSS样式内容
    /// </summary>
    /// <param name="page">页面</param>
    /// <param name="content">样式内容</param> 
    public static void AddStyle(System.Web.UI.Page page, string content)
    {
        HtmlGenericControl styleControl = new HtmlGenericControl("style");
        styleControl.Attributes.Add("type", "text/css");
        styleControl.InnerHtml = content;
        page.Header.Controls.Add(styleControl);
    }

    /// <summary>
    /// 添加Meta标签
    /// </summary>
    /// <param name="page">页面</param>
    /// <param name="name">HttpEquiv</param>
    /// <param name="content">Meta内容</param> 
    public static void AddMeta(System.Web.UI.Page page, string name, string content)
    {
        HtmlMeta meta = new HtmlMeta();
        meta.HttpEquiv = name;
        meta.Content = content;
        page.Header.Controls.Add(meta);
    }